package org.apache.maven.configuration;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import org.apache.maven.model.Build;
import org.apache.maven.model.Model;
import org.apache.maven.model.Plugin;
import org.apache.maven.model.PluginExecution;
import org.apache.maven.model.PluginManagement;
import org.codehaus.plexus.util.StringUtils;

/**
 * A basic bean configuration request.
 * 
 * @author Benjamin Bentmann
 */
public class DefaultBeanConfigurationRequest implements BeanConfigurationRequest {

  private Object bean;

  private Object configuration;

  private String configurationElement;

  private ClassLoader classLoader;

  private BeanConfigurationValuePreprocessor valuePreprocessor;

  private BeanConfigurationPathTranslator pathTranslator;

  public Object getBean() {
    return bean;
  }

  public DefaultBeanConfigurationRequest setBean(Object bean) {
    this.bean = bean;
    return this;
  }

  public Object getConfiguration() {
    return configuration;
  }

  public String getConfigurationElement() {
    return configurationElement;
  }

  public DefaultBeanConfigurationRequest setConfiguration(Object configuration) {
    return setConfiguration(configuration, null);
  }

  public DefaultBeanConfigurationRequest setConfiguration(Object configuration, String element) {
    this.configuration = configuration;
    this.configurationElement = element;
    return this;
  }

  /**
   * Sets the configuration to the configuration taken from the specified build plugin in the POM.
   * First, the build plugins will be searched for the specified plugin, if that fails, the plugin
   * management section will be searched.
   * 
   * @param model The POM to extract the plugin configuration from, may be {@code null}.
   * @param pluginGroupId The group id of the plugin whose configuration should be used, must not be
   *        {@code null} or empty.
   * @param pluginArtifactId The artifact id of the plugin whose configuration should be used, must
   *        not be {@code null} or empty.
   * @param pluginExecutionId The id of a plugin execution whose configuration should be used, may
   *        be {@code null} or empty to use the general plugin configuration.
   * @return This request for chaining, never {@code null}.
   */
  public DefaultBeanConfigurationRequest setConfiguration(Model model, String pluginGroupId, String pluginArtifactId,
      String pluginExecutionId) {
    Plugin plugin = findPlugin(model, pluginGroupId, pluginArtifactId);
    if (plugin != null) {
      if (StringUtils.isNotEmpty(pluginExecutionId)) {
        for (PluginExecution execution : plugin.getExecutions()) {
          if (pluginExecutionId.equals(execution.getId())) {
            setConfiguration(execution.getConfiguration());
            break;
          }
        }
      } else {
        setConfiguration(plugin.getConfiguration());
      }
    }
    return this;
  }

  private Plugin findPlugin(Model model, String groupId, String artifactId) {
    if (StringUtils.isEmpty(groupId)) {
      throw new IllegalArgumentException("group id for plugin has not been specified");
    }
    if (StringUtils.isEmpty(artifactId)) {
      throw new IllegalArgumentException("artifact id for plugin has not been specified");
    }

    if (model != null) {
      Build build = model.getBuild();
      if (build != null) {
        for (Plugin plugin : build.getPlugins()) {
          if (groupId.equals(plugin.getGroupId()) && artifactId.equals(plugin.getArtifactId())) {
            return plugin;
          }
        }

        PluginManagement mngt = build.getPluginManagement();
        if (mngt != null) {
          for (Plugin plugin : mngt.getPlugins()) {
            if (groupId.equals(plugin.getGroupId()) && artifactId.equals(plugin.getArtifactId())) {
              return plugin;
            }
          }
        }
      }
    }

    return null;
  }

  public ClassLoader getClassLoader() {
    return classLoader;
  }

  public DefaultBeanConfigurationRequest setClassLoader(ClassLoader classLoader) {
    this.classLoader = classLoader;
    return this;
  }

  public BeanConfigurationValuePreprocessor getValuePreprocessor() {
    return valuePreprocessor;
  }

  public DefaultBeanConfigurationRequest setValuePreprocessor(BeanConfigurationValuePreprocessor valuePreprocessor) {
    this.valuePreprocessor = valuePreprocessor;
    return this;
  }

  public BeanConfigurationPathTranslator getPathTranslator() {
    return pathTranslator;
  }

  public DefaultBeanConfigurationRequest setPathTranslator(BeanConfigurationPathTranslator pathTranslator) {
    this.pathTranslator = pathTranslator;
    return this;
  }

}
